Hope
College Department of Physics and Engineering
Research Experiences for Undergraduates
Summer 2006
Project Summary
Research Experiences for Undergraduates
Summer 2006
Project Summary
|
Hope
College Department of Physics and Engineering Research Experiences for Undergraduates Summer 2006 Project Summary |
| Project Title: | Liquid Helium Study |
| Student Name: | Michael Siegers |
| Student's Home Institution: | |
| Research Advisor: | Dr. John Krupczak |
| Source of Support: | NSF-REU Grant No. 0452206 |
The objective at the present juncture in this research was to determine the ability of the cryostat to retain liquid helium (LHe) at 4 Kelvin. Preliminary results indicate that the cryostat adequately retains LHe at 4 K. The rate of LHe boil off in the cryostat is on order of that predicted by conductive heat transfer calculations. Work has also been done on constructing 4 current sources to power the temperature sensors inside the cryostat. The current sources are designed to deliver a constant current of 10.0 ľA of current regardless of the load resistance (provided by the temperature sensors) on the current source circuit. Two sources have been completed so far and both have been tested for resistance range and drift with favorable results.
*This material is based upon work supported by the National
Science Foundation under NSF-REU Grant No. 0452206